One Hundred Paper Cuts is a project which attempts to fix 100 usability errors reported by the users for the new Ubuntu 9.10 Karmic Koala.
One of the most popular "paper cuts" concerns Nautilus, the default file browser in GNOME. Its graphical interface could be improved a lot: the space currently devoted to the menu / columns is too big and takes away space for the really important stuff.
Thanks to developer Marcus Carlson, we now have a patch available which simplifies the Nautilus interface, as shown in the picture above. The sidebar remains intact and only some useless information was removed; the top toolbar saves a lot of space by using icons for the most used actions.